Attaching-plug



Patented Feb. 24, 1.920.

xix/ x? Mlheoo QM,

. 50" tion of the plug removed THUMBrS D. FINIZIG, 01E KITCE' ATTACLHIN G-PL'U Gr.

LSSLfiist'.

'- Application ens time 1916, Serial No. 31,8

' if all wit-cm it may concern:

' known that l, Thrones D. Fnuzio, tizen of the United States, residing at iiitchawan, 'Westchester county, in the State New York, have invented certain new and useful lmprovementsin Attaching-Flugs, of which the following is a full, clear and eX- act specification. This invention relates to an improvement in attachment plugs and has for its object to provide a plug which may be secured to or removed from a socket Without twisting the conductors which connect the plug to the electrically operated device.

A further object is to provide a plan which will permit of the electrically op era-ted device being; moved freely during us without twisting the connecting conductors.

A further object is to provide a plug having a set of contacts adapted to engage the contacts of a socket, and a second set of contacts engaging the contacts of the firstnained set and being rotatable with respect thereto.

A further object is prising a casing a member rotatable within said casing and carrying a set of cont-acts engaging the contacts of the first-named set.

A. further object is to provide a l c which is of simple construction and to which the connecting conductors may be easily and quickly attached.

Other objects will in part be obvious and in part be pointed out hereinafter.

To the attainment of the aforesaid and ends, my invention consists the novel details of construction, and in the combine tion, connection and arrangement of parts so. hereinafter more fully described and then pointed out in the claims.

In the accompanying drawings showing an illustrative embodiment of the invention'-' -Fi iu-e l is a view in side elevation of the fattaclirnent plug; f n 2 is a sectional view of the socket engaging portion of the plug;

" Fig. 3 is a similar view of the body pori'rorn the socket engaging portion thereof; Fig. 4 is a plan view of the plug, and

"'tatab le and therebyllefering the contactsv carried the drawings the attachment Specification of Letters Tiatent.

to provide a plug conr havin a set of contacts, and

Fi 5is aperspective view of the rov Serial Klo. 810,876.

plug comprises a casing consisting of a socket-engaging portion 10 and a bodv por tron ll r'letachatly secured to the socket-engaging portion and normally locked against movement with respect thereto whereby the attachment plug may readily be inserted in or withdrawn from an electric socket.

T he socket-engaging portion 10 comprises a metallic shell having a threaded annular wall provided at one of its ends with an inwardly extending flange, 13 to which is cured a base consisting of two spaced nietallie plates 15;, 15 engaging the outer and inner surfaces of the flange 13 and spaced -from one anoth r by insulating material 16. The plates l eand 15 are provided with cen trally positioned apertures to receive a metallic member 17 which extends through the apertures and is insulated from the plates '1' by the insulating material 16. As shown the metallic member 17 is in the form of pin having headed ends 18, 18 engaging the insulating material 16. hen the attachment plug is positioned Within a socket the metallic shell will engage one of the socket termin ls and the metallic member will en gage ier thereof.

' The hoo portion 11 ct he attachment plug preferably formed of insulating material and comprises a head portion 19 and an ant ar 26 adapted to extend within the shell the soclzetngaging porti 16* and beinr oi'f subs tar lallv the sauna h a t he v 3.2 erect. 'lfhe tiee i i: 21; provi 'l its surface with thread 21 ac .pted to engage the thread the Wall 12 the shell whereby the o may detachably secured to one annoy In order to hold the parts against tive movement to enable the plug to be screwed into and; unscrewed the socket, the body portion 11 is prov? with a sprin 22 having a projection g) adapted to proyect through-an aperture 2 formed in the wall 12 or" the shell when parts are properly assembled. When it desired to the parts it is merely nec essary to press upon the projection 23 force it in vardly until it is out of eng'a ment with the opening 29; whereupon body p Red and rtion 11 may be UHSC-TO The head 19 of the body portion has n opening therethrough to receive a cable 26 or the hke and is further provided with recess 27 surrounded by a-seat Q8 and communicating with the aperture and the chamber 29 formed by the annular flange 20. Positioned within the chamber 29' and free to rotate therein is ablock 30, preferably formed of insulating material, which rests upon the seat 28 and has a reduced portion 31 extending within the recess 27. The block 30 is provided with an aperture registering with the aperture 25 in thehead 19 to receive the cable 26.

Mounted upon the block are a pair of resilient contacts 32 and 33 having opp ositely extending free ends 34: and 35 respectively arranged in superimposed relation to one another. When the w parts of the attachment plug are assembled the free end 34 of the contact 32 engages the inner end of the metallic member 17, and the free end 35. of the contact 33, which is preferably forked, as shown in Fig. 5, engages the inner surface of the plate 15 of the base of the metallic shell. The contacts 32 and 33 are so proportioned that, when the parts of the. plug are assembled, their free ends 34 and 35 will be depressed slightly whereby, owing to the resiliency of the contacts, said ends will be pressed against the metallic member 17 and the plate t5 thus insuring good electrical connections therewith. I

' The conductors 36 and 37 of the cable 26 are secured to the contacts 32 and 33 in any suitable manner.

' I111 operation the cable- 26 is passed through the aperture 25 in the head 19 of the body portion 11 and through the aperture in the block 30 whereupon the ends of the conductors 36 and 37 are-connected to the contacts 32 and 33. The block 30 is then positioned within the chamber 29 in en gagement with the seat 28 after which the body portion 11 is secured to the socketengaging portion 10 as above set forth, the portions being automatically locked together by the engagement of the projection 23 on the spring 22 with the aperture 24 in the wall 12 of the metallic shell.

The attachment plug may then be screwed within an electric socket by a rotary movement of the casing, the thread of the wall 12'ot' the metallic shell engaging the Y threaded sleeve forming a part of the sockets of theusual and well known construction. As the casing of the plug and the block 30 are free to rotate relatively to one another the rotary movement of the casing necessary to secure the plug within the socket will not cause a twisting of the cable. Furthermore, when the plug positioned within the casing the electrically operated device which is connected to the other end of the .cable 26 may be freely moved in any direction without tii isting the cab e as any movement of such device which would tend to twist the cable will merely cause the cable and the by the rotation of the'block 30 within the casing of the plu Having thus described my said invention,

what I claim and desire to secure by Letters Patent is 1.-An attachment plug comprising a casing having contacts adapted to engage the contacts of a socket, a member rotatably positioned within said casing, and contacts carried by said member and engaging said first mentioned contacts, said casing being provided with an opening in one of its walls to receive conductors adapted for connectionto the contacts on said rotatable member,

substantially as specified.

2. An ,attachment plug comprising a casing having contacts adapted to engage jthe cdntacts of asocket, said casing having a base and a head, a member rotatably positioned within said casing, and contacts carried by said member and engaging said first mentioned contacts, said head being provided with an opening to receive conductors adapted for "connection to the contacts on said rotatable member, substantially as specified.

3. An attachment plug comprising a casing consisting of a plurality of detachably connected parts and having a set of contacts, a member positioned wholly within said casing and rotatable with respectthereto, and contacts mounted upon said'member and engaging the contacts of said set, one of said parts being provided with an opening to receive conductors adapted to be connected to the contacts on said member, substantially as specified.

4. An attachment plug comprising a cas contacts, a rotatable member positioned within said hollow body portion, and contacts mounted uponssaid rotatable member and engaging the contacts of said set, substantially as specified.

6. An attachment plug comprising a casing consisting of a socket-engaging portion and a body portion detachably secured thereto, said portions being provided with co-acting locking means tohold them in their assembled position, said socket-engaging portion having a set of contacts, a member contained within said casing and rotatable with respect thereto, and contacts mounted upon said member and engaging the contacts of said set, substantially as specified.

7 An attachment plug comprisinga casing having a set of contacts, said casing being provided with a seat, a memberpositioned wholly within said casin and resting upon said seat, said member eing rotatable with respect to said seat, and contacts mounted upon said rotatable member and engaging the contacts of said set, substant'a 1y as specified.

8. An attachment plug comprising a casing having a set of contacts, saidcasing being provided with a seat, a member positioned wholly within said casing and resting upon said seat, said member being rotatable with respect to said seat, and resilient contacts mounted upon said rotatable member and enga ing the contacts, of said set, substantially as specified.

9. An attachment plug comprising a socket-er gaging portion consisting of a metallic shell having a base and a metallic member carried by said base and insulated therefrom, a body portion detachably secured to said socket-engaging portion and forming a casing therewith, a member positioned within said casing and free to rotate with respect thereto when said portions are assembled, and a pair of contacts mounted upon said member and engaging said base I and said metallic member respectively, substantially as specified.

10. An attachment plug comprising a socket-engaging portion consisting of a metallic shell having a base and a metallic member carried by said base and insulated therefrom, a body portion of insulating material detachably, secured to said socket-engaging portion and forming a casing therewith, a member positioned within said casing and free to rotate with respect thereto when said portions are assembled, and a pair of contacts mounted upon said member and engaging said base and said metallic member respectively, substantially as specified.

11. An attachment plug comprising a socket-engaging portion consisting of a metallic shell having a base and a metallic member carried by said base and insulated therefrom, said metallic member extending inwardly of said shell, a body portion detachably secured to said socket-engaging portion and forming a casing therewith, a member positioned within said casing and free to rotate with respect thereto when said portions are assembled, and a pair of contacts mounted upon said member and having free ends engaging said base, and said metallic member respectively, substantially as specified.

12. An attachment plug comprising a socket-engaging portion consisting of a metallic shell having a base and a metallic member carried by said base and insulated therefrom, said metallic member extending inwardlyot said shell, a body portion detachably secured to said socket-engaging portion and forming a casing therewith, a member positioned within said casing, and a pair of contacts mounted upon said member and having superimposed free ends engaging said base and said metallic member respectively, substantially as specified.

13. An attachment plug comprising a metallic shell having an annular wall and a base, a metallic member carried by said base and insulated therefrom, a body portion detachably secured to said shell, said body portion having a head and an annular flange extending within said shell and engaging the annular wall thereof,-a member engag ing said head and positioned within said annular flange, and a pair of contacts mounted upon said member and engaging the base of said shell and said metallic member respectively, substantially as specified 14. An attachment plug comprising a metallic shell having an annular wall and a base, a metallic member carried by said base and insulated therefrom, a body portion detachably secured to said shell, said body portion having a head and an annular flange extending within said shell and engaging the annular wall thereof, said head having a recess formed therein and having a seat surrounding said recess, a member engaging said seat and having a reduced portion extending within said recess, and a pair of contacts mounted upon said member-and engaging the base of said shell and said metallic member respectively, substantially as specified.

Signed at the city of New York, in the county and State of New York, this 11th dayof February, one thousand nine hundred and sixteen.

THOMAS D. FINIZIO.

Witnesses:

CQNRAD A. Drernnrcn, ANNA Ross. 

